In related info:
Bacteria start to colonise the intestines and colon shortly after birth, and adults carry up to 100 trillion microbes, representing more than 1,000 different species.

The researchers say the body is a mixture of bacteria and human cells and some scientists believe as many as 90 percent of the cells on our body are actually bacteria.
----
That means you are only about 10% human cells and the other 90% of you is microbes of various sorts!